function Map(el){
    this.el =el
    this.width = '800px'
    this.height='400px'
}
Map.prototype.create=function(){
    this.el.style.width=this.width
    this.el.style.height=this.height
    this.el.style.background='url(./bg.png)'
    this.el.style.border='10px solid green'
    this.el.style.position = 'relative'
}